S-3000 Internal Door

The S-3000 is Stark’s Internal Door Closure which is manufactured in diameters ranging from 6” to 84” (DN150 to DN2100) in pressure series 150 to 2500. The closure concept relies on the proven method of an internal locking ring that slides into the inner side of the closure hub.

S-2000 Clamp Ring

The S-2000 Clamp Ring Closure is manufactured primarily for pipeline applications ranging from 2” to 48” (DN50 to DN1200) in diameter. We understand the variety of needs that pipeline applications require and as a standard, all closures are certified to ASME B31.3/B31.4/B31.8/CSA Z662 Cat. I with a 0.5/0.6 design factor.

S-500 Threaded

The Stark S-500 Threaded Closure represents historically the most widely used closure style in the oil and gas sector. Based on the industry’s desire for robust and cost-effective solutions, Stark improved upon the standard design to bring operation to a new level.